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Title: Saturn's magnetic field revealed by the Cassini Grand Finale
Authors: Dougherty, MK
Cao, H
Khurana, KK
Hunt, GJ
Provan, G
Kellock, S
Burton, ME
Burk, TA
Bunce, EJ
Cowley, SWH
Kivelson, MG
Russell, CT
Southwood, DJ
First Published: 5-Oct-2018
Publisher: American Association for the Advancement of Science
Citation: Science, 2018, 362 (6410)
Abstract: During 2017, the Cassini fluxgate magnetometer made in situ measurements of Saturn's magnetic field at distances ~2550 ± 1290 kilometers above the 1-bar surface during 22 highly inclined Grand Finale orbits. These observations refine the extreme axisymmetry of Saturn's internal magnetic field and show displacement of the magnetic equator northward from the planet's physical equator. Persistent small-scale magnetic structures, corresponding to high-degree (>3) axisymmetric magnetic moments, were observed. This suggests secondary shallow dynamo action in the semiconducting region of Saturn's interior. Some high-degree magnetic moments could arise from strong high-latitude concentrations of magnetic flux within the planet's deep dynamo. A strong field-aligned current (FAC) system is located between Saturn and the inner edge of its D-ring, with strength comparable to the high-latitude auroral FACs. [See also erratum]
DOI Link: 10.1126/science.aat5434
eISSN: 1095-9203
Version: Post-print
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Deposited with reference to the publisher’s open access archiving policy. (
Description: Erratum for the Research Article “Saturn’s magnetic field revealed by the Cassini Grand Finale” by M. K. Dougherty, H. Cao, K. K. Khurana, G. J. Hunt, G. Provan, S. Kellock, M. E. Burton, T. A. Burk, E. J. Bunce, S. W. H. Cowley, M. G. Kivelson, C. T. Russell, D. J. Southwood Science 12 Oct 2018: Vol. 362, Issue 6411, eaav6732 DOI: 10.1126/science.aav6732 In the Research Article “Saturn’s magnetic field revealed by the Cassini Grand Finale,” a copyediting error led to the inadvertent omission of the sign of the value for Gauss coefficient g70 in Table 1 online. The correct value is –59.6. The online version has been corrected. In addition, the authors corrected three supplementary figure callouts on p. 6 and an in-text citation on p. 7.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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